Wiring Diagram - Fs-155 Combi Ladder - Williamson-Thermoflo FreeStyle 2 Series Manual

FreeStyle
Series 2 wall mount gas-fired water boiler — Boiler Manual
25 Wiring diagram — FS-155 Combi Ladder
®
FreeStyle
Figure 76
NOTES:
1. All wiring must be installed in
accordance with N.E.C. and
any other national state or local
requirements.
2. Room thermostat should be a
dry contact type and should draw
power from the control board:
should not be greater than 24
VAC and 500 mA.
3. Terminals 1 & 2 are powered with
120 VAC for LWCO, 3 Amps
Max.
4. In case of questions during instal-
lation please contact your local
W-T Tech Services.
Legend
16 Fan
32 Central heating pump
42 DHW temperature sensor
44 Gas valve
72 Room thermostat (optional)
81 Ignition electrode
95 Mixing (diverting) valve
104(1) Fuse 3.15A
104 (1) Fuse 630mA
58
114 Water pressure switch
136 Flow meter
138 Outside temperature sensor (optional on Combi)
186 Return temperature sensor
191 Exhaust temperature sensor
278 Double sensor (heating + safety)
279 Transformer 115-24 VAC
284 Relay SPST-Coil 24 VAC
370 LWCO (not included)
373 "OPENTHERM" communication (Not used)
L N
Part number 550-142-950/0919